ar features cleanup

[kfarr]

As a user I want to get a QR code to enter VR mode. I want to then share that QR code with others. I want QR code to specify exact long/lat and have attempt to help with magnetic north rotation.

https://github.com/3DStreet/3dstreet/pull/571

Some tasks include:

• [ ] update the license key for variant launch to restore custom card
• [ ] basic UI to enter / exit AR mode for supported mobile devices
• [ ] experiment with no redirect for variant launch unless using QR code
• [ ] finish manual adjustment UI concepts started in glitch: https://glitch.com/edit/#!/compass-orientation
• [ ] experiment with simplified compass capabilities in faces-north component from this repo: https://github.com/MediaComem/LBAR.js/tree/main